Blast fuknage



2 Sheets-Sheet l (N6MbdeL) W ROTTHOFF. BLAST FURNACE APPLIANCE.

Patented Feb. 23, 1886.

%IAES: m5

, INVENTOR,

.BY N $43k ATTORNEY (No Model.) 2 Sheets-Sheet 2.

ROTTHOFP. BLAST FURNACE APPLIANCE.

No. 336,249. Patented Feb. 23; 1886.

I BY N. Z3 7??? ATTORNEY.

UNITED STATES PATENT OFFICE.

\IILLIAM ROTTHOI F, OF PITTSBURG, PENNSYLVANIA.

BLAST-FURNACE APPLIANCE.

SPECIFICATION forming art of Letters Patent No. 336,749,dated Pebruary23, 1886.

Application filed June 27, 1584.

To alt whom it may concern.-

Be it known that I, WILLIAM Rorrnorr, a subject of the Emperor of Germany, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Blast-FurnaceAppliances, of which improvements the following is a specification.

In the accompanying drawings, which make part of this specification, Figure 1 is a view showing the top of a blast-furnace and the. chargehoisting mechanism inffront elevation. Fig. 2 -is a view showing the same parts in. sectional side elevation. Fig. 3 is a top pla'n view of the feed-hopper.

M yin vention relates to an improved manner "of constructing the ways and mechanism for hoisting and charging ores and other materials into a blast-furnace.

The object of my invention is to so construct the hoisting and charging mechanism that the materials charged in said furnace shall be evenly distributed, and't-hat the gases escap-' ing from the furnace may be so directed as to prevent their lateral escape on opeiiing the top of the furnace for the admission of the charge, and to so construct the hoisting mechanism as to facilitate the hoisting and delivery of the material to the feeding-hopper; and to these ends my invention consists in the construction andcombination of parts, all as more fully hereinafter described and claimed- The blastfurnace A is of the usual form and construction, and in its top is secured the receiving-chamber, which consists of the annular metal band 2, secured in the mouth of the furnace, the conicalgband 3, supported on an inwardly-projecting flange of the band 2, and the conical top 4, bolted to an outwardly-pro- 0 jecting flange of the band 2 and formed of a series of flanged sections bolted together. These flanged sect-ions are formed of cast-iron, and one or more are provided with apertures 5, which are closed by the hinged doors 6, as shown.

In place of forming the top 4 of a-series of flanged cast iron sections, as above described, said top may be formed of a number of T- irons secured to the flange of the band 4, the spaces between the T-irons being filled with metal plates riveted to the flanges of the T- irons.

Serial No. 135,133. (No model.)

On the top piece, 4, is supported the feedhopper, which consists of the receiving-basin 8 and the funnel 9. The receiving-basin 8 is an oblong vessehhaving its ends 10 curved and inclined inwardly, and its sides 12 being curved and inwardly inclined from their centers to their ends, as shown at 11, Fig. 3, said ends being secured to the edges of the curved end pieces, as shown; In the opening formed by the ends 10 and sides 12 is located the funnel 9, having a diameter at its upper and larger end equal to the width of the receiving basin at its middle portion, as clearly shown.

This hopper, constructed as described, rests upon an outward projecting flange formed around the upper edge of the top 4: otthe re- I through which pass the bolts 14, said bolts passing up through beams located above the hopper, as shown, the upper ends of these bolts being threaded and provided with suitable nuts, whereby said bolts may be drawn up through the beams, thereby raising the hopper from the top 4 when desired.

From the ground or st0ck-house floor are erected four inclined skids, 15, formed of two channel-irons, 16, arranged back to back and riveted to the flanges of two similar but narrower channels located between the channelirons 16; or in place of the above construction the channels 16 maybe united on their upper surface by a strip of metal extending longitudinally along them and riveted to their flanges, and the channels in their under edges maybe united by a system of lattice-work. These skids. extend up to and beyond the top of the furnace to which they are secured by this brackets 17,- riveted to the casing of the-furnace at its top. are supported by the inclined'braces 18,which are supported at their lower ends by thebrackets 19, riveted to the casing of the furnace in the side opposite the brackets 17. The skids and braces are firmly secured to gether at their top by a plate, 20, and are in-' termediately braced'by the cross-beams 21, which ext nd between the channel-irons forming the s ids and braces, as described, and are firmly secured to said'braces and skids by The upper ends of these skids .it to drop through the center the hopper onto the apex of the bell, thus insuring an even distribution;

inclined chute extendingfrom one side of the receiving-hopper to the vertical lift; but this fails to embody my invention in that by the use of double tracks extending to and over the ends of an oblong hopper the materials can be discharged into the hopper at opposite ends-alternately, thereby more constant supply of material, bntalsoa more equable distribution of the same.

It will be observed that by the above-described construction of hopper and arrange lnent of tracks or skids I am enabled to regulate the charging in accordance with the working of the furnace and the character of ore employed-as for example, if theiurnaceis working down evenly, the charge is delivered alternately at opposite ends ofthe hopper,the cars being tipped with suificient rapidity to give the charge the requisite impetus to cause of the funnel of insuring not only a butin case the furnace is working more rapidly on one side than the other the charge is delivered in that side onlyand the car is tipped slowly, so that the material will move slowly downthe incline of the hopper,

I on one side of the apex and will be directed to the side desired.

It is an important characteristic of my apparatus that the charging and the above described regulation can be effected from the ore-floor, thus avoiding the necessity of the presence of a workman or attendant at the top of the furnace. 1

I claim herein as myiuventiou- 1. As an improvement in mechanism for charging furnaces, an oblong hopper arranged with a common central discharge therefrom directly over and onto the apex of the bell, and having avreceiving-chamber at each end and on opposite sides of the central discharge,

in combination with inclined double tracks or skids suitable for the movement of cars thereon, and extending upward one to and over one end of the oblong hopper and the other to and over the other end, substantially as set forth.

2.-As an improvement in blast-furnace charging apparatus, an oblong hopper having a. central discharge orifice or funnel, in combination with a receiving-chamber located in themouth of the furnace, a bell for closing the discharge-opening in, the receiving chamber, and hoisting mechanism arranged to deliver furnace material at opposite ends of the hopper alternately, substantially I as set forth.

charging apparatus,

3. -As an improvement in blast-furnacea receiving-chamber located in the mouth of the furnace, in combination with a hopper located above the receivingchamber and adjustable to and from ghehreceiving-chamber, substantially as set Ort and in dropping through the funnel will strike the hell 4. A 'receiving chamber located in the mouth of a blast-furnace, in combination with a bell arranged in the discharge-orifice of the receiving-chamber, the suspending-rod connecting said bell and its operating-lever, and the protecting sleeve and washer surrounding said rod, substantially as set forth.

5. In a blast-furnace, a receiying-chamber in combination with a hopper located above said chamber and provided with a central discharge orifice or funnel, and a stack arranged centrally above the opening in the hopper and having an internal diameter greater than the diameter of said orifice or funnel, substantially as set fort I 6. In a blast-furnace-filling apparatus, an oblong hopper arranged with a common central discharge therefrom, aud having a receiving-chamber at each end and on opposite sides of the central discharge, in combination with inclined double tracks provided with suitable rails and extending from'the ore-floor to the top of the furnace, said rails having their upper ends bent so as to project horizontally over the top of the furnace, similarly-inclined auxiliary rails arranged outside of the main rails extending beyond the bent portion of the main rails, a car provided with front and rear wheels, the tread of the rear wheels having a width sufiicient to ride upon the auxiliary rails, a bail pivoted to the rear end of the car, and a double receivingbasin, substantially as set forth.

7. As an improvement in blast-furnacecharging apparatus, a receiving-chamber located in the mouth of the furnace and having its walls extending "above the top of the furnace, in combination with a hopper supported by such extended walls and provided with a central discharge-orifice, substantially as set forth.

8. As an improvement in blast-furnacecharging apparatus, a receiving-chamber 10-. cated in the mouth of the furnace and its walls extending above the top of the furnace and composed of partible sections, in combination with a hopper resting upon such extended wall-sections and adjustable to and from the same, substantially as set forth.

9. As an improvement in blast furnacecharging apparatus, a receiving-chamber located in the mouth of the furnace and having its walls extending above the top of the furnace, such extended walls being provided with doors, in combination with a hoppersupported by true receiving-chamber, substantially as set fort a -In testimony whereof Iihave hereunto set my hand. I

WILLIAM ROTTHOFF.

, Witnesses:

; R. H. Wmmnnsnv,

DARWIN 8. Women. 

